As someone who opens boxes non-stop at work, this cutter knife is a lifesaver. The self-retracting blade is genius – no more accidental pokes when I shove it in my pocket mid-task.

The spare blade storage is clutch. I once dropped my old knife down a conveyor belt (oops), but having a backup blade ready saved my shift. The edge guides? Perfect for slicing tape without nicking merchandise.

After six months of daily abuse, the blue grip shows my fingerprints permanently etched into it. That's how you know a tool's been properly loved. The blade does stay short though – great for tape but struggles with triple-wall cardboard.

What surprised me most? The satisfying *click* when changing blade settings. There's something weirdly therapeutic about fidgeting with it during lunch breaks.

Would I buy a fourth one after inevitably losing this? Absolutely. These things disappear like socks in a dryer, but they're worth every replacement.